Time to follow fashions avoiding indecency (6)
I believe the answer is:
modest
'avoiding indecency' is the definition.
I can't tell whether this definition defines the answer.
'time to follow fashions' is the wordplay.
'time' becomes 'EST' (EST is an example).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'follow fashions' becomes 'mod' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'est' after 'mod' is 'MODEST'.
Can you help me to learn more?
(Other definitions for modest that I've seen before include "Unassuming; limited" , "self-effacing" , "Simple, humble" , "Not having or showing pride" , "'Unassuming, diffident (6)'" .)